Forum Discussion
Exchange Hybrid centralized email flow bypass issue
I believe this needs to be set to true else this is just accepting any email as long as its TLS, you will need to test as much as possible because im not sure how this will handle the wildcard. See the value settings below.
Did this resolve your issue?
I did not get a chance to test the change but please take a look at this link that provides a different solution for exactly the same scenario https://o365info.com/configure-exchange-online-inbound-mail-flow-to-accept-smtp-connection-only-from-a-specific-mail-security-gateway-ip-address/
Ok but remember connectors are cumulative, all you are doing here is adding additional ways to receive and not restricting anything as per your original question.
You need to do something with the original connector that is accepting internet mail.
